//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "inline-cost"
#include "llvm/Analysis/InlineCost.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Analysis/TargetTransformInfo.h"
+#include "llvm/IR/CallSite.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/GetElementPtrTypeIterator.h"
#include "llvm/IR/GlobalAlias.h"
+#include "llvm/IR/InstVisitor.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Operator.h"
-#include "llvm/InstVisitor.h"
-#include "llvm/Support/CallSite.h"
#include "llvm/Support/Debug.h"
-#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
+#define DEBUG_TYPE "inline-cost"
+
STATISTIC(NumCallsAnalyzed, "Number of call sites analyzed");
namespace {
void disableSROA(Value *V);
void accumulateSROACost(DenseMap<Value *, int>::iterator CostIt,
int InstructionCost);
- bool handleSROACandidate(bool IsSROAValid,
- DenseMap<Value *, int>::iterator CostIt,
- int InstructionCost);
bool isGEPOffsetConstant(GetElementPtrInst &GEP);
bool accumulateGEPOffset(GEPOperator &GEP, APInt &Offset);
bool simplifyCallSite(Function *F, CallSite CS);
SROACostSavings += InstructionCost;
}
-/// \brief Helper for the common pattern of handling a SROA candidate.
-/// Either accumulates the cost savings if the SROA remains valid, or disables
-/// SROA for the candidate.
-bool CallAnalyzer::handleSROACandidate(bool IsSROAValid,
- DenseMap<Value *, int>::iterator CostIt,
- int InstructionCost) {
- if (IsSROAValid) {
- accumulateSROACost(CostIt, InstructionCost);
- return true;
- }
-
- disableSROA(CostIt);
- return false;
-}
-
/// \brief Check whether a GEP's indices are all constant.
///
/// Respects any simplified values known during the analysis of this callsite.
}
bool CallAnalyzer::visitAlloca(AllocaInst &I) {
- // FIXME: Check whether inlining will turn a dynamic alloca into a static
+ // Check whether inlining will turn a dynamic alloca into a static
// alloca, and handle that case.
+ if (I.isArrayAllocation()) {
+ if (Constant *Size = SimplifiedValues.lookup(I.getArraySize())) {
+ ConstantInt *AllocSize = dyn_cast<ConstantInt>(Size);
+ assert(AllocSize && "Allocation size not a constant int?");
+ Type *Ty = I.getAllocatedType();
+ AllocatedSize += Ty->getPrimitiveSizeInBits() * AllocSize->getZExtValue();
+ return Base::visitAlloca(I);
+ }
+ }
// Accumulate the allocated size.
if (I.isStaticAlloca()) {
}
bool CallAnalyzer::visitPtrToInt(PtrToIntInst &I) {
+ const DataLayout *DL = I.getDataLayout();
// Propagate constants through ptrtoint.
Constant *COp = dyn_cast<Constant>(I.getOperand(0));
if (!COp)
}
bool CallAnalyzer::visitIntToPtr(IntToPtrInst &I) {
+ const DataLayout *DL = I.getDataLayout();
// Propagate constants through ptrtoint.
Constant *COp = dyn_cast<Constant>(I.getOperand(0));
if (!COp)
// a common base.
Value *LHSBase, *RHSBase;
APInt LHSOffset, RHSOffset;
- llvm::tie(LHSBase, LHSOffset) = ConstantOffsetPtrs.lookup(LHS);
+ std::tie(LHSBase, LHSOffset) = ConstantOffsetPtrs.lookup(LHS);
if (LHSBase) {
- llvm::tie(RHSBase, RHSOffset) = ConstantOffsetPtrs.lookup(RHS);
+ std::tie(RHSBase, RHSOffset) = ConstantOffsetPtrs.lookup(RHS);
if (RHSBase && LHSBase == RHSBase) {
// We have common bases, fold the icmp to a constant based on the
// offsets.
Value *LHS = I.getOperand(0), *RHS = I.getOperand(1);
Value *LHSBase, *RHSBase;
APInt LHSOffset, RHSOffset;
- llvm::tie(LHSBase, LHSOffset) = ConstantOffsetPtrs.lookup(LHS);
+ std::tie(LHSBase, LHSOffset) = ConstantOffsetPtrs.lookup(LHS);
if (LHSBase) {
- llvm::tie(RHSBase, RHSOffset) = ConstantOffsetPtrs.lookup(RHS);
+ std::tie(RHSBase, RHSOffset) = ConstantOffsetPtrs.lookup(RHS);
if (RHSBase && LHSBase == RHSBase) {
// We have common bases, fold the subtract to a constant based on the
// offsets.
return false;
}
if (CS.isCall() &&
- cast<CallInst>(CS.getInstruction())->hasFnAttr(Attribute::NoDuplicate))
+ cast<CallInst>(CS.getInstruction())->cannotDuplicate())
ContainsNoDuplicateCall = true;
if (Function *F = CS.getCalledFunction()) {
/// no constant offsets applied.
ConstantInt *CallAnalyzer::stripAndComputeInBoundsConstantOffsets(Value *&V) {
if (!DL || !V->getType()->isPointerTy())
- return 0;
+ return nullptr;
unsigned IntPtrWidth = DL->getPointerSizeInBits();
APInt Offset = APInt::getNullValue(IntPtrWidth);
do {
if (GEPOperator *GEP = dyn_cast<GEPOperator>(V)) {
if (!GEP->isInBounds() || !accumulateGEPOffset(*GEP, Offset))
- return 0;
+ return nullptr;
V = GEP->getPointerOperand();
} else if (Operator::getOpcode(V) == Instruction::BitCast) {
V = cast<Operator>(V)->getOperand(0);
Function *Caller = CS.getInstruction()->getParent()->getParent();
// Check if the caller function is recursive itself.
- for (Value::use_iterator U = Caller->use_begin(), E = Caller->use_end();
- U != E; ++U) {
- CallSite Site(cast<Value>(*U));
+ for (User *U : Caller->users()) {
+ CallSite Site(U);
if (!Site)
continue;
Instruction *I = Site.getInstruction();
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
/// \brief Dump stats about this call's analysis.
void CallAnalyzer::dump() {
-#define DEBUG_PRINT_STAT(x) llvm::dbgs() << " " #x ": " << x << "\n"
+#define DEBUG_PRINT_STAT(x) dbgs() << " " #x ": " << x << "\n"
DEBUG_PRINT_STAT(NumConstantArgs);
DEBUG_PRINT_STAT(NumConstantOffsetPtrArgs);
DEBUG_PRINT_STAT(NumAllocaArgs);
char InlineCostAnalysis::ID = 0;
-InlineCostAnalysis::InlineCostAnalysis() : CallGraphSCCPass(ID), DL(0) {}
+InlineCostAnalysis::InlineCostAnalysis() : CallGraphSCCPass(ID) {}
InlineCostAnalysis::~InlineCostAnalysis() {}
}
bool InlineCostAnalysis::runOnSCC(CallGraphSCC &SCC) {
- DL = getAnalysisIfAvailable<DataLayout>();
TTI = &getAnalysis<TargetTransformInfo>();
return false;
}
DEBUG(llvm::dbgs() << " Analyzing call of " << Callee->getName()
<< "...\n");
- CallAnalyzer CA(DL, *TTI, *Callee, Threshold);
+ CallAnalyzer CA(Callee->getDataLayout(), *TTI, *Callee, Threshold);
bool ShouldInline = CA.analyzeCall(CS);
DEBUG(CA.dump());